ivew数控件Tree自定义节点内容示例分析
demo地址:https://run.iviewui.com/plcWlM4H
<template>
<Tree :data="data5" :render="renderContent"></Tree>
</template>
<script>
export default {
data () { return {
data5: [
{
title: 'parent 1',
expand: true,
children: [
{
title: 'child 1-1',
expand: true,
children: [
{
title: 'leaf 1-1-1',
expand: true
},
{
title: 'leaf 1-1-2',
expand: true
}
]
},
{
title: 'child 1-2',
expand: true,
children: [
{
title: 'leaf 1-2-1',
expand: true
},
{
title: 'leaf 1-2-1',
expand: true
}
]
}
]
}
],
buttonProps: {
type: 'default',
size: 'small',
}
}
}, //<Icon type="ios-create-outline" /> methods: {
renderContent (h, { root, node, data }) {
//console.log(root, '树的根节点', node, '当前节点', data, '当前节点数据');
/* @root <Array> 把整个树 扁平化 后的 数组
@node <Object> 当前节点
@date <Object> 当前节点数据 nodeKey 每个节点 的唯一标识
parent 父级的 nodeKey */
return h('span', {
class: 'span1',
style: {
display: 'inline-block',
width: '100%'
},
}, [
h('span', [
h('Icon', {
props: {
type: 'ios-paper-outline'
},
class: 'wenjiantubiao',
style: {
marginRight: '8px'
}
}),
h('span', data.title) // 节点标题
]),
h('span', { //右侧操作 包裹
class: 'youcecaozuo',
style: {
display: 'inline-block',
float: 'right',
marginRight: '32px'
}
}, [
h('Button', { //添加按钮
props: Object.assign({}, this.buttonProps, {
icon: 'ios-add'
}),
style: {
marginRight: '8px'
},
on: {
click: () => { this.append(data) }
}
}),
h('Button', { //删除按钮
props: Object.assign({}, this.buttonProps, {
icon: 'ios-remove'
}),
on: {
click: () => { this.remove(root, node, data) }
}
})
])
]);
},
append (data) {
const children = data.children || [];
children.push({
title: 'appended node',
expand: true
});
this.$set(data, 'children', children);
},
remove (root, node, data) {
//console.log(root, node, data, '三个东西');
console.log(node, '确定的node节点');
/*
因为 参数node 是从 root 上引用 处理的 所以 find 时 可以 判断 el对象 和 node 对象是否相等,
详见:https://www.cnblogs.com/taohuaya/p/11535432.html
*/
const parentKey = root.find(el => {
console.log(el, 'root每项');
return el === node;
}).parent; //找到删除项的 父级标识 const parent = root.find(el => el.nodeKey === parentKey).node; //通过 删除的 父级标识 找到 父级元素
const index = parent.children.indexOf(data); //在父级的children数组 中 找到当前删除元素 的索引 index
parent.children.splice(index, 1); //在父级children中 删除掉 要删除的元素
}
}
} /*
render: (h, { root, node, data }) => {
return h('span', {
style: {
display: 'inline-block',
width: '100%'
}
}, [
h('span', [
h('Icon', {
props: {
type: 'ios-folder-outline'
},
style: {
marginRight: '8px'
}
}),
h('span', data.title)
]),
h('span', {
style: {
display: 'inline-block',
float: 'right',
marginRight: '32px'
}
}, [
h('Button', {
props: Object.assign({}, this.buttonProps, {
icon: 'ios-add',
type: 'primary'
}),
style: {
width: '64px'
},
on: {
click: () => { this.append(data) }
}
})
])
]);
}, */ </script>
视图: